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A Linear Matrix Inequality Approach to The Peak-to-Peak Guaranteed Cost Filtering Design

IFAC Proceedings Volumes 2000年第14期33卷 29-34页

作者： Reinaldo M. Palhares Pedro L.D. Peres Jaime A. Ramírez Pontifical Catholic University of Minas Gerais Graduate Program in Electrical Engineering Av. Dom José Gaspar 500 Prédio 4 30535-610 Belo Horizonte MG Brazil School of Electrical and Computer Engineering University of Campinas CP 6101 13081-970 Campinas SP Brazil. Department of Electrical Engineering Federal University of Minas Gemis Av. Antônio Carlos 6627 31270-010 Belo Horizonte MG Brazil.

The problem of robust filtering design for uncertain linear systems with guaranteed peak-to-peak performance is addressed in this paper. The uncertain parameters are assumed to belong to convex bounded domains (i.e. polytope type uncertainty). The aim is to design a full-order stable linear filter that minimizes the worst-case peak value of the filtering error output signal with respect to all magnitude bounded noise inputs, in such way that the filtering error system remains robustly stable. The minimization provides an upper bound to the L ∞ induced gain ( ℓ ∞ for discrete-time systems) of the filtering error system. The conditions for the existence of such robust filter are provided in terms of linear matrix inequalities, allowing the use of standard convex optimization procedures to solve the problem. Both continuousand discrete-time systems are considered. The formulation presented is illustrated by examples.

关键词： Robust Estimation Filter Design Uncertain Linear Systems Peak-to-Peak Gain Linear Matrix Inequalities

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IEEE Transactions on Circuits and Systems for Video Technology 2000年第2期10卷 185-185页

作者： Ngan, King N. Strintzis, Michael G. Tanimoto, Masayuki Wang, Yao Dept. of Electrical & Electronic Engineering University of Western Australia Nedlands WA 6907 Australia Electrical & Computer Engineering Department University of Thessaloniki 540 06 Thessaloniki Greece Department of Information Electronics Graduate School of Engineering Nagoya University Nagoya 464-8603 Furo-cho Chikusa-ku Japan Department of Electrical Engineering Polytechnic University Brooklyn NY 11201 United States

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Fuzzy logic technology in reactive power control

Fuzzy logic technology in reactive power control

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International Conference on Electric Utility Deregulation and Restructuring and Power Technologies (DRPT)

作者： P.Y. Ekel L.D.B. Terra M.F.D. Junges A.V. Prakhovnik F.J.A. De Oliveira A. Melek R. Kowaltschuk T.Y. Taguti Post Graduate Program in Electrical Engineering Pontifical Catholic University of Minas Gerais Belo Horizonte Minas Gerais Brazil Institute for Energy Savings and Energy Management National Technical University Kharkov Polytechnic Institute Kiev Ukraine Transmission System Operation Superintendence Parana State Energy Company Curitiba Parana Brazil

This paper presents results of research aimed at improving efficiency of coordinated on-line control of reactive power on the basis of developing models, methods, and a control system, integrating traditional numerical techniques with fuzzy logic technology. An approach associated with experimental design is considered to construct diverse types of sensitivity indices, which serve as the basis for multi-attribute evaluating efficiency of control actions and, therefore, for forming rules included in a knowledge base. Procedures related to classifying power system states are presented. Questions of the construction and tuning of linguistic variables as well as rational implementation of fuzzy logic procedures are discussed.

关键词： Fuzzy logic Reactive power control Power system modeling Fuzzy control Fuzzy set theory Power system control Power systems Control system synthesis Design for experiments Expert systems

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Robust H ∞ Filtering for Linear Continuous-Time Uncertain Systems With Multiple Delays: An LMI Approach

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IFAC Proceedings Volumes 2000年第14期33卷 249-254页

作者： Reinaldo M. Palhares Pedro L.D. Peres Carlos E. de Souza Pontifical Catholic University of Minas Gerais Graduate Program in Electrical Engineering Av. Dom José Gaspar 500 Prédio 4 30535-610 Belo Horizonte MG Brazil. School of Electrical and Computer Engineering University of Campinas CP 6101 13081-970 Campinas Sp Brazil Department of Systems and Control Laboratório Nacional de Computção Científica - LNCC Av. Getúlio Vargas 333 25651-070 Petrópolis RJ Brazil.

The problem of robust H ∞ filter design for uncertain continuous-time linear systems with multiple time-delayed states is addressed in this paper. The uncertainties are assumed to belong to convex bounded domains (polytope type uncertainty) and the time delays are supposed to be constant. Delay-independent as well as delay-dependent stability conditions assuring robust stability and a prescribed H ∞ disturbance attenuation for the filtering error system are established, in both cases, in terms of linear matrix inequalities, which can be efficiently solved by standard optimization procedures with global convergence assured. Two illustrative examples are analyzed.

关键词： Time-delay systems Delay-dependent stability Delay-independent stability Robust H ∞ filtering Linear matrix inequalities

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Robust H/sub /spl infin// filtering design with pole constraints for discrete-time systems: an LMI approach

Robust H/sub /spl infin// filtering design with pole constra...

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American Control Conference (ACC)

作者： R.M. Palhares P.L.D. Peres Graduate Program in Electrical Engineering Ponificia Universidade Católica de Mines Gerais Belo Horizonte Minas Gerais Brazil DT-School of Electrical and Computer Engineering State University of Campinas-UNICAMP Sao Paulo Brazil

The problem of full order guaranteed cost H/sub /spl infin// filtering design for discrete-time systems with polytope type uncertainty is investigated. The main purpose is to obtain a stable linear filter such that the filtering error system remains quadratically stable within a prespecified H/sub /spl infin// attenuation level. Necessary and sufficient conditions for the existence of such robust filter are provided in terms of linear matrix inequalities (LMIs), which can be efficiently solved by means of high performance convex optimization procedures with global convergence assured. Moreover, as an improvement, the filter dynamics can be constrained to some specific regions inside the unit open disk.

关键词： Robustness Nonlinear filters Riccati equations Attenuation Filtering theory Electronic mail White noise Robust control Uncertainty Output feedback

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Robust filtering with guaranteed energy-to-peak performance — an LMI approach

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IFAC Proceedings Volumes 1999年第2期32卷 1814-1819页

作者： Reinaldo M. Palhares Pedro L.D. Peres Pontifícia Universidade Católica de Minus Gerais Graduate Program in Electrical Engineering Av. Dom José Gaspar 500 Prédio 4 30535-610 Belo Hotizonte - MG - Brazil School of Electrical and Computer Engineering University of Campinas DT/FEEC/UNICAMP - CP 6101 13.081-970 Campinas - SP - Brazil

The problem of robust energy-to-peak filtering for linear systems with convex bounded uncertainties is investigated in this paper. The main purpose is to design a full order stable linear filter that minimizes the worst-case peak value of the filtering error output signal with respect to all bounded energy inputs, in such way that the filtering error system remains quadratically stable Necessary and sufficient conditions arc formulated in terms of Linear Matrix Inequalities - LMIs, for both continuous- and discrete-time cases.

关键词： Robust Estimation Filter Design Uncertain Linear Systems Convex programming Energy-to-Peak Gain Linear- Matrix Inequalities

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Robust H/sub /spl infin// filter design for uncertain discrete-time state-delayed systems: an LMI approach

Robust H/sub /spl infin// filter design for uncertain discre...

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IEEE Conference on Decision and Control

作者： R.M. Palhares C.E. De Souza P.L.D. Peres Graduate Program in Electr. Eng. Pontifical Catholic Univ. of Minas Gerais Belo Horizonte Brazil Laboratório Nacional de Computação Científica-LNCC Petropolis Rio de Janeiro Brazil School of Electrical and Computer Engineering State University of Campinas-UNICAMP Sao Paulo Brazil

The problem of robust H/sub /spl infin// filtering for discrete-time uncertain linear systems with multiple state delays is addressed. The uncertain parameters are supposed to belong to a given convex bounded polyhedral domain. Sufficient conditions for the existence of a stable linear filter assuring stability and a prescribed H/sub /spl infin// performance for the filtering error system for all allowed uncertainties are established in terms of linear matrix inequalities. Efficient numerical algorithms can be used to solve the problem, as illustrated via an example.

关键词： Robustness Filters Filtering Noise level Attenuation Noise measurement Signal processing Stability Delay Symmetric matrices

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The Deepwater Project - A sea of change for the USCoast Guard

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NAVAL ENGINEERS JOURNAL 1999年第3期111卷 125-131页

作者： Anderson, M Burton, D Palmquist, MS Watson, JM Lieutenant Commander Michael Anderson:serves as the Communications Director for the Coast Guard's Deepwater Project. He has an extensive background in electronic systems with previous work experience including–lead electronics design engineer for the Coast Guard's new HEALY icebreaker supervisor of west coast shipboard electronics projects and Commanding Officer of a regional electronics support command. LCdr. Anderson holds a BS degree in electrical engineering from the Coast Guard Academy MS degrees in electrical engineering and engineering management from Northeastern University and recently received an MS in the management of technology from MIT. Diane Burton:is Surface Technical Director for the U.S. Coast Guard Deepwater Project. Previously she worked as a senior Naval architect in the Hull Form and Hydrodynamics Division of the Naval Sea Systems Command. She has worked for several years on the hydrodynamics of a variety of ship classes with the U.S. Navy U.S. Coast Guard and NOAA. She was responsible for surface ship developments and small combatant stability updates which include the following tasks: Hull Form Design System (HFDS) upgrades Integrated Computation Design Environment Database development for NAVSEA's Hydrodynamics/Hydroacoustics Technology Center Cooperative Research Navies international program for the development for dynamic stability criteria and FFG/DDG class stability. She has a BSE and MSE from the University of Michigan in naval architecture and marine engineering and is presently pursuing a masters of engineering management from George Washington University specializing in systems engineering technology insertion and project management. Commander M. Steven Palmquist:is the Deepwater Project's Assistant Project Manager for C4ISR. A Registered Prokssional Engineer he received an MSEE from the Naval Postgraduate School in 1988. He did undergraduate work in naval architecture at the University of Michigan and is also a graduate of the National Test Pilot School's Avionics Tes

The United States Coast Guard has embarked on the most ambitious modernization and recapitalization project in the service's history. The Deepwater Capabilities Replacement Project, which is simply referred to as Deepwater, is unique in that it comprises the acquisition of an entire integrated "System-of-Systems'': surface, air, (CISR)-I-4 (command, control, communications, computers, information, surveillance & reconnaissance), and logistics facilities. This "System of Systems" approach will enable the Coast Guard to acquire the optimal mix of fully supportable assets, to effectively and efficiently perform all of its Deepwater missions well into the next century.

关键词： Naval warfare

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Lasers, waveguides and fibers for 3.0 μn medical applications. 2

Lasers, waveguides and fibers for 3.0 μn medical applicatio...

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2nd GR-I International Conference on New Laser Technologies and Applications

作者： Serafetinides, A.A. Papayannis, A.D. Fabrikesi, E.T. Rickwood, K.R. Wang, Y. Shi, Y.W. Miyagi, M. Croitoru, N. Harrington, J. Nubling, R. National Technical University of Athens Department of Physics Zografou Campus Athens157 80 Greece University of Essex Department of Physics ColchesterC04 3SQ United Kingdom Tohoku University Electrical Communications Department Graduate School of Engineering Sendai780 77 Japan Tel Aviv University Department of Electrical Engineering 69978 Israel State University of New Jersey - Rutgers Fiber Optic Materials Research Program PiscatawayNJ08855-0909 United States

In the last few years, there has been an increasing interest for the 3.0 μm laser radiation, as this wavelength is very strongly absorbed by the water and the other components of soft and hard tissue, in various medical applications, as soft tissue treatment, atherosclerotic plaques removal, treatment of eye lenses, vitreous surgery, hard tissue treatment, bone cutting and drilling, dentistry applications etc. For all these medical applications reliable lasers emitting in the 3.0 μm wavelength range are needed and thus an intensive development effort is going on throughout the world. Our laser development effort, with the EnYAG and the HF lasers, the only lasers emitting in the 3.0 μm wavelength part of the spectrum, in N.T.U.A., is briefly described in this article. For each one of the above possible medical applications, a demand for good flexible delivery systems, for pulsed Er:YAG or continuous wave and pulsed HF laser radiation arises. Several research groups around the world have suggested some possible solutions and among them are sapphire fibers, zirconium fluoride glasses, hollow metallic waveguides, hollow dielectric waveguides, hollow plastic waveguides, etc. In this paper we present the transmission properties of dielectric coated silver hollow glass waveguides fabricated in Japan, dielectric coated quartz waveguides and hollow plastic waveguides fabricated in Israel, sapphire fibers fabricated in U.S.A., and fluoride glass fibers fabricated in France, we compare their straight and bent loss characteristics and we discuss their potential in the above mentioned medical applications. © 1998 SPIE. All rights reserved.

关键词： Medical applications

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Applying fuzzy functions and sequential coordination to optimization of machinery arrangement and pipe routing

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NAVAL ENGINEERS JOURNAL 1998年第6期110卷 43-54页

作者： Wu, BC Young, GS Schmidt, W Choppella, K Dr. Bi-Chu Wu:received a PhD in Mechanical Engineering from the University of Maryland College Park in 1991. She has worked on projects involving naval architecture design optimization solid mechanics and database development. Presently a senwr engineer with Angle Incorporated Dr Wu's research interests are in design optimization and fuzzy logic applications. Dr. Gin-Shu Young: a senior engineer with Angle Incorporated holds a PhD in Mechanical Engineering from the University of Maryland College Park. As a guest researcher with National Institute of Standards and Technologies from 1990 to 1993 he worked on vision-based navigation for autonomous vehicles. His experience also includes applications of optimization fuzzy logic neural network and genetic algorithm methods to engineering system design Mr. William Schmidt:co-founded Angle Incorporated in 1990 and has served as Vice PresidentlChiefScientist during this tame. He holds a B.Sc. in Applied Science from the Naval Acadt?my and an M.Sc. in Physics from the Naval Post Graduate School. He has cner 20 years experience in technical leadership material and personnel management. He has led the application of computer aided design (CAD) and Product Model Information Exchange to the shipbuilding industry. His experience also includes leading the amlication of model based operational analysis to support the Live Fire Test Program for DDG 51 Class Destroyers. Mr. Krishna M. Choppella:is a Sofware Engineer at Eidea Laboratories Incotporated where he works on componentbased distributed enterpvise frameworks. He has been involved in creating data analysis tools for the US Nay by integrating CAD modeis databases and graphical front ends. His work in the Masters degree program in Mechanical Engineering at the University of Texas at Austin was in di0ddase.r spectroscopy of combustion products in porous-matri burners. He received his Bachelors degree in Electrical Engineering in India. He was a Research Associate at the Centre for Laser Technology and Project Engi

Ship design is often multidisciplinary involving several design elements with various types of objectives and constraints (O/C) some easily described as mathematical formulas, others better modeled as descriptive assertions. This paper describes a method based on fuzzy functions and an integrated performance index to model O/C using descriptive assertions to be used with mathematical formulas in optimization. Another issue addressed in this paper concerns the coordination of design elements when sequentially coupled, that is, when one leads the other and the performance of the follower depends greatly on the design of the leader. Based on neuro-fuzzy techniques, the method described here coordinates and optimizes sequentially coupled elements. The two methods are applied to machinery arrangement (MA) and pipe routing (PR). Preliminary models for optimization of MA and PR are described considering convenience, producibility: engine room size, interference and location as factors in the O/C set. Some test results from MA/PR applications are presented and discussed. The methods are generic and can be extended to other elements in ship design. They are mutually independent and may be used separately Two advantages of their use are an improvement in overall performance and a reduction in the need for redesign of elements.

关键词： Optimization

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